Name: Brother MFC-9840CDW
Brand: Brother
Rating: 4 (1 reviews)

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120

Colored streaks or bands down

the page

 One of the toner cartridges may be damaged. Replace the toner

cartridge that matches the color of the streak or band. (See Replacing

a toner cartridge on page 169.)

 Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 156.)

 Make sure each corona wire’s green tab is at the home position (b).

 The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 174.)

 The fuser unit may have a smudge mark. Call Brother Customer

Service at 1-800-284-4329 (in USA) or 1-877-BROTHER (in

Canada).

Colored lines across the page

 One of the toner cartridges may be damaged. Replace the toner

cartridge that matches the color of the line. (See Replacing a toner

cartridge on page 169.)

 The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 174.)

 Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 156.)

 Clean the laser scanner windows with a soft cloth. (See Cleaning the

laser scanner windows on page 152.)

White spots or hollow print

 Make sure that you use paper that meets our specifications. (See

Acceptable paper and other media on page 11.)

 Make sure that the recommended paper was used.

 Choose Thick paper mode in the printer driver or in the machine’s

Paper Type menu setting, or use thinner paper than you are currently

using. (See Paper type on page 22 and Basic tab in the Software

User’s Guide on the CD-ROM.)

 Change the paper to fresh, unopened paper.

 Check the machine’s environment. Conditions such as high humidity

can cause hollow print. (See Choosing a location on page 96.)

 Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 156.)

If the print quality has not improved, put in a new drum unit. (See

Replacing the drum unit on page 174.)

Completely blank or some

colors are missing.

 Make sure that the toner cartridges are installed properly. (See

Replacing a toner cartridge on page 169.)

 One of the toner cartridges may be damaged. Identify the missing

color and put in a new toner cartridge for the color with the white line.

(See Replacing a toner cartridge on page 169.)

 The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 174.)

Examples of poor print

quality

Recommendation

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Other manuals for Brother MFC-9840CDW

Service Manual491 pages

Quick Setup Guide53 pages

Network User's Guide204 pages

Reference Manual62 pages

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Brother MFC-9840CDW Specifications

General

Print technology	Laser
Maximum resolution	600 x 2400 DPI
Economical printing	Yes
Time to first page (black, normal)	16 s
Time to first page (color, normal)	17 s
Print speed (black, normal quality, A4/US Letter)	20 ppm
Scan to	E-mail, FTP, OCR, USB
Scanner type	Flatbed scanner
Grayscale levels	256
Input color depth	48 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	4, 9, 16, 25
Copy speed (black, normal quality, A4)	16 cpm
Faxing	Mono faxing
Fax memory	400 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	300
Total input capacity	250 sheets
Total output capacity	150 sheets
Multi-Purpose tray input capacity	50 sheets
Auto document feeder (ADF) input capacity	35 sheets
Internal memory	128 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	54.5 dB
Custom media sizes	(69.9 - 216mm) - (116 - 406.4mm)
Dimensions (WxDxH)	530 x 539 x 520 mm
Networking features	10/100Base-TX
Wireless technology	IEEE 802.11b/g
All-in-one functions	Copy, Fax, Scan
Maximum internal memory	0.640 GB
Color all-in-one functions	copy, print, scan
Media weight (tray 1)	60 - 105g/m2
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size), Letter (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
JIS B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Security algorithms	LEAP
Supported network protocols (IPv4)	TCP/IP (IPv4 & IPv6)
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
Bundled software	ScanSoft PaperPort (Win) NewSoft Presto! PageManager (Mac)
Power consumption (PowerSave)	36 W
Power consumption (average operating)	515, 100 W
Package weight	45800 g
Digital sender	No
Maximum duty cycle	3000 pages per month
Market positioning	Business